diff options
| author | Wang Long <w@laoqinren.net> | 2019-12-18 20:38:18 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-01-17 10:19:22 +0100 |
| commit | 3d817689a62cf71bbb290af18cd26cf9764f38fe (patch) | |
| tree | 649fe8b3effdf91b818a9cd6bdc23634f6e0a8e1 /kernel/sched | |
| parent | 4c58f57fa6e93318a0899f70d8b99fe6bac22ce8 (diff) | |
sched/psi: create /proc/pressure and /proc/pressure/{io|memory|cpu} only when psi enabled
when CONFIG_PSI_DEFAULT_DISABLED set to N or the command line set psi=0,
I think we should not create /proc/pressure and
/proc/pressure/{io|memory|cpu}.
In the future, user maybe determine whether the psi feature is enabled by
checking the existence of the /proc/pressure dir or
/proc/pressure/{io|memory|cpu} files.
Signed-off-by: Wang Long <w@laoqinren.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lkml.kernel.org/r/1576672698-32504-1-git-send-email-w@laoqinren.net
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/psi.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index ce8f6748678a..db7b50bba3f1 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -1280,10 +1280,12 @@ static const struct file_operations psi_cpu_fops = { static int __init psi_proc_init(void) { - proc_mkdir("pressure", NULL); - proc_create("pressure/io", 0, NULL, &psi_io_fops); - proc_create("pressure/memory", 0, NULL, &psi_memory_fops); - proc_create("pressure/cpu", 0, NULL, &psi_cpu_fops); + if (psi_enable) { + proc_mkdir("pressure", NULL); + proc_create("pressure/io", 0, NULL, &psi_io_fops); + proc_create("pressure/memory", 0, NULL, &psi_memory_fops); + proc_create("pressure/cpu", 0, NULL, &psi_cpu_fops); + } return 0; } module_init(psi_proc_init); |